Sectional boiler



N. ACHEY SECTIONAL BOILER May 3, 1949.

6 Sheets-Sheet 1 Filed April 15, 1946 ATTORNEY y 3, 1949. N. ACHEY 2,469,253

SECTIONAL BOILER- Filed April 15, 1946 e Sheets-Sheet 2 JNVENTOR. N. ACHEV 7 TTORNEU May 3, 1949. N. ACHEY 2,469,253

SEQTIONAL BOILER Filed April 15, 1946 6 Sheets-Sheet 3 IN V EN TOR. N. QCHEU ATTORNEU y 1949. N. ACHEY SECTIQNAL BOILER Filed April 15, 1946 6 Sheets-Sheet 4 HAM,

mmmvzy N. ACHEY SECTIONAL BOILER May 3, 1949.

6 Sheets-Sheet 5 Filed April 15, 1946 IN V EN TOR; I N. ncnzy mmmwzu N. ACHEY SECTIONAL BOILER May 3, 1949.

6 SheetQ-Sheet 6 Filed April 15, 1946 JNVENTOR. .N. HCHE9 75 Ed 12 Q 15 AJTORNESI Patented May 3, 1949 UNITED STATES PATENT OFFICE SECTIONAL BOILER Norwood Achey, Rossville, Ga.

Application April 15, 1946, Serial No. 662,387

2 Claims.

This invention pertains to boilers and has more particular reference to boilers of the sectional type.

Sectional type boilers usually comprise a front and a back section with any number of intermediate sections, depending upon the size and capacity of the boiler. Such boilers are usually made of cast iron and may be shipped in knockdown form and assembled at the place of installation. Such construction permits ready removal and replacement of burnt-out or defective sections of the boiler, which, in the case of boilers made of cast iron, is frequently required.

One object of the present invention is to provide a boiler having a front and a back section and one or more intermediate sections in which all sections are made of flat steel plate welded together.

Another object of the invention is to provide a sectional boiler having a large heating surface, no point of which is contacted by fire or heated gases without being water backed.

Another object of the invention is to provide a sectional boiler in which the heated gases make three longitudinal passages through the boiler, whereby the heat loss up the stack or chimney is reduced to a minimum.

Another object of the invention is to provide a sectional boiler that is simple and inexpensive to construct, economic and efficient in operation, and readily adapted to burn either coal, wood or liquid fuel.

A further object of the invention is to provide a sectional boiler made in sections that can be easily handled by two persons and moved through ordinary doorways.

A further object of the invention is to provide a sectional boiler in which the sections are held together by outside headers.

Other objects and advantages of the invention will appear in the specification, when considered in connection with the accompanying drawings, in which:

Fig. 1 is a perspective view of the boiler as viewed from the front left hand side;

Fig. 2 is a front elevation view of the boiler;

Fig. 3 is a vertical cross sectional view, taken on the line 3--3 of Fig. 2;

Fig. 4 is a front view of an intermediate section;

Fig. 5 is a side view of the intermediate section shown in Fig. 4;

Fig. 6 is a rear view of the back section;

Fig. 7 is a front view of the back section;

Fig. 8 is a vertical sectional View, taken on the line 8-8 of Fig. 7;

Fig. 9 is a vertical sectional view, taken on the line 99 of Fig. 7;

Fig. 10 is a horizontal sectional view, taken on line |6l0 of Fig. 7;

Fig. 11 is a front view of the front section;

Fig. 12 is a rear view of the front section;

Fig. 13 is a horizontal sectional view, taken on line l3-l3 of Fig. 12;

Fig. 14 is a horizontal sectional view, taken on line |4l4 of Fig. 12; and

Fig. 15 is a vertical sectional view, taken on line l5l5-of Fig. 12.

In Fig. 1 there is shown a perspective view of a boiler constructed in accordance with the present invention. The boiler comprises a front section In, a rear section II, and a plurality of intermediate or mid-sections I 2, mounted on a base l3. Each section of the boiler and the base are preferably made of flat sections of sheet steel welded together.

A front header! is mounted on top of the boiler and comprises a drum I5 having a plurality of depending flanged nipples I6, secured thereto as by welding. The drum and the nipples are preferably'made of steel pipe. The top of the drum is provided with the usual outlets, including a gauge connection l1, safety valve connection I 8 and risers l9 and 20 for connection to a hot water or low pressure steam heating system. All of these outlets are preferably made of steel pipe welded to the drum and have threaded openings.

Bottom headers 2| are "located on each side of the boiler, near the bottom thereof; and each comprises a drum 22 having a row of horizontally extending flanged nipples 23 secured thereto, preferably by welding. The drums 22 and the nipples 23 are preferably made of steel pipe.

An equalizing pipe 24 connects the top header and the right hand bottom header. The front, back and each of the mid-sections are provided with a flanged riser 25 connected to one of the flanged nipples l6 extending downwardly from the top header and a pair of horizontally extending flanged nipples 26, one located on each side thereof and being connected to one of the nipples 23 projecting from the adjacent bottom header. The risers 25 and the nipples 26 are preferably made of steel pipe and are secured to their respective sections preferably by welding.

One or more inlet connections 21 are mounted on the bottom header and are connected to the heating system. These connections are preferably made of steel pipe having a threaded opening and are secured to the bottom header, preferably by welding.

A smoke hood 28, preferably made of sheet steel, is mounted on the upper rear end of the back section and is secured thereto preferably by welding, one open end of the smoke hood communicating with the flue passage through the boiler and the other open end being adapted to be connected to a; chimney or stack.

The base l3 of theboiler is preferably made up of steel plates set on edge and tack welded together, forming a hollow space within and underneath the boiler. Angle irons 29 are welded around the top edges of the base tovhelp sup-, port the boiler sections.

4 edges of the plates 58 and 59 are Welded to the contiguous side edges of the plate 55 and the lower edges of plates 58 and 59 are welded to the transversely extending plate 45. A rectangular shaped water passage 60 is formed on the inner surface of the front plate between the openings 4i and connects the upper triangular shaped water passage Ki l. and the triangular shaped water passage ll in the lower portion of the hollow section. A plurality of stay bolts 6!. may be welded to the front and rear plates of the water passages if considered desirable.

A boiler constructed in accordanceuwiththe present invention is readily adaptable to burn coal, wood, or liquid fuel. In the particular embodiment shown, an automatic stoker is provided. The stokenretort-SO .isdoc'ated within the base of the boiler and the space-between the walls of the base and thestoker retontisbricked up with fire brick 3|. In so far as the present invention is concerned, 'thestoker may-be of any :conventional type. The stoker shownicomprises a retort located within the spaceldefined by the upright walls of thebase 13: aifuel feed'tube 32 having a rotary teed screw 33 mounted therein. andextending outwardly through .anrolpening provided in the front ofthe.baserfirracasing 34 mounted in the outer end of the ieedtube for housing the operating mechanism 101' :'the screw "33 a .fuel hopper 35 mounted on theieedstubeyatube 36 forsu'pplyingz air to'ethe retort; and an ash removal tube 31.-

" IntFigs. 3,11; 12., 13; 11.122115 15 there 'is'shown the'details ref-thefroht sect-ton with theriser connections to .the.t0p:.an d:=.bottom Jheads omitted. The iront'section isiafl'iollowisectionali structure having a substantially zrectangular. shape and comprises a top plate 36, si'delplates v3! and 38, bottom plate '39an'1dfa :frontrplate :40, all made of flat sheetsteel welded: tngethen. The front plate 40 is provided withia spacedpa'ir of nonzontally' alignedcopenings 4.! near-the top, to provide access to: theflue.passages;v each opening being" provided with a hinged "door. l2 "and a centrally located opening 'l-tinear the bottom to provide'iaccess I to the combustionschamber; the opening being: provldedwlth a; hinged adoor '44. 1A fiat horizontal? plate .135 :of sheet steel is located within the hol1ow1- -section': and. i'extends 2 transversely thereof at a point aligned withthe lower edges or the openings-41 r Fourtriangularishapedcommunicating wateripassages46,111,!!! and 49,1surrounding the lopeningflpare formed in the lower half of the front-section by-meansnf .four trapezoi'dal-sh'aped flatsteelplates 5.0, 51, 52 "and 53, each plate having its drontie'dge welded to the front plate 49; its side edges :welded to the contiguous edges oiathe adiacentplatesand itsrear edge "welded to the'flrearliedges or the side plates 31, tapbottom-platescam the plate 45.

A triangularlshaped water-passage 1541s formed acrosstlie top of the ifront section 'bymeans or a trapezoidal-shaped'.plate :55 having. its front edge welded to the trout plate 111 and its rear edge'w'elded tothe reartedgevot th'e'top plate 36. Triangular. shaped 'vvater passages" 56 and '5.1"-are formed?- alongr-the "uppertsides or 'the front section by 'nieansioitrapezoidalsha-ped. platesx58 and 59, each having itsxrrent'edge welded to: the "front platetil and 'itszrearredge "welded toithei rear :edge of the adjacent side plates '31- and: r "Iheupper' The intermediate or mid-sections are of identical construction. In Figs. 4 and 5 there is shown the details of an intermediate section with the riser connections to the top and bottom headers. omitted. Each intermediate section is a hollow sectional structure made up of fiat sections of sheet steel welded together and comprises a substantially rectangular shaped hollow member 62 having hollow elongated rectangular shaped. vertical legs 53 and 64 formed on each end, .the hollow sections forming communicatingwater passages. The member 62 has four horizontal aligned spaced apart flue passages :65 formed therein.

In Figs, 6, E, 8, 9 and 10 there is shown the details of the rear section with the riser'connections to the top and bottom headers omitted, The rear section is a hollowsectiona'l structure having a substantially rectangularshape and comprises a top plate 66, side plates 51, 68,' bottom plate 59, front plate "ill and aibac'k plate "l l,'a1l made of sheet steel welded-together; "The back plate H is formed with a spaced pair of horizontally aligned opepings l2 and I31near the top to provide an exit for the flue passages. The front plate it is of less width than the backplate H and has two spaced apart integral vertical extensions 14 and E5 formed Ollits upper edge. The side plates El and Stare of identical construction and each comprises an elongatedrectangular member having an integral triangularshaped upper end.

A pair of trapezoidal shaped plates 16 and 11 have their upperedgeswelded to the forward edge of the top plate 66 and their lower edges welded to the upper edges of-the extensions 74 and 15, respectively; of the front plate 10, to form triangular shaped water passages l8 and 19.

A spaced pair of horizontally-extending flue passages 89 and Mare-formed in the back section by means ofvertica'l-pla-tes 82, 83, 84 and 85 and horizontal plates 86, 81, 8'8 and 89. These plates have their rear edges Welded to the back plate H along-theedge's of the openings 12 and have their contiguous side edges welded to each other.

Triangular shaped water passages '90, 9i and 92 areformed along'the'outer sides and the bottom of the flue passages jby'means of trapezoidal shaped plates 93, 94 and 95. These plates have their rear edges welded to the edges of the recess formed in the front plate "l0 by the extensions 19 and 75 and have their contiguous side edges welded together, The upper edges of plates 93 and 9-5 are welded tothe-side-edges' of plates 16 and Ti.

A flat rectangular plate 96 having an elongated integral depending rectangular extension 91 forms the front wall of;a rectan-gular shaped water passage 93 located centrally of the top of the back section and communicating with water passages IS-and T9. The aipperaedge of plate 95 is welded to the front. edge of 'top plate "as, the side edges of plate 96 are Welded to the .front edges of plates93 and 9dzt Theiibottomedge's of plate 96 and the side edges of extension 91 are welded to the contiguous front edges of plates 83, 84, 86 and 81. The bottom edge of member 91 is welded to the front edge of trapezoidal shaped plate 94, thus forming a vertical water passage 99 located between the flue passages 88 and 8| and communicating with the water passages 9| and 98. A plurality of stay bolts Hill may be welded to the front and back walls of the water space formed between the front plate 10 and the back plate H, if considered desirable.

Vertically extending triangular shaped water passages lill and H32 are formed on the outer ends of the back section by means of flat vertical plates I03 and NM. The plate l 93 has its front edge welded to the front edge of side plate 61, its bottom edge Welded to the bottom plate 69, its rear edge welded to the side edge of front plate 10 and its upper edge welded to the outer edge of plate 16. Plate I 94 has its front edge welded to the front edge of side plate 68, its bottom edge welded to the bottom plate 69, its rear edge welded to the side edge of front plate 19 and its upper edge Welded to the outer edge of plate TI. The bottom plate 69 is formed with forwardly projecting integral triangular shaped extensions on each end and has its edges welded to the contiguous bottom edges of the front plate 10, back plate H and plates I93 and I04, thus forming a water passage I 05 extending across the greater portion of the back section.

Each section of the boiler, when constructed as above set forth, is of light weight and can be readily handled by two men. Also, due to their size and shape, they may be carried through ordinary sized doorways and passageways.

In assembling the boiler, the base is first assembled and the particular type of automatic stoker mounted therein. Then, the front, back and intermediate sections are mounted on the base. The top and bottom headers are then assembled on the boiler. The entire boiler is held together by the headers. The joints between the sections are preferably sealed on the outside with boiler putty to prevent escape of gas. In the event any one of the sections becomes defective it can be readily removed for repair and replacement.

A combustion chamber N36 is provided within the boiler, the lower portions of the front and back sections forming water backed front and rear walls, respectively, of the combustion chamber. The hollow vertical legs 63 and 64 of the intermediate sections form water backed side walls and the bottoms of the hollow members 62 of the intermediate sections form the water back top wall of the combustion chamber.

The heated gases of combustion pass rearwardly through the combustion chamber to the front wall of the back section, where they contact the forwardly and upwardly inclined plates 16 and H which direct them forwardly into the two outer flue passages 55 extending through the intermediate sections. The heated gases pass through the two outer flue passages to the front section, where they strike the front plate of the front section and are directed rearwardly into the two inner flue passages 95 extending through the intermediate sections. After passing through the intermediate sections, they pass through the flue passages and BI of the rear section and into the smoke box and thence to the chimney or smoke stack. This results in the heated gases of combustion making three passages through the boiler, thereby reducing the heat loss up the smoke stack to a minimum.

From the foregoing description, it will be seen that the improved sectional boiler of the invention embodies features making the boiler highly desirable from the standpoint of simplicity and economy of operation, efficiency of combustion and heat transfer, and compactness.

Obviously, the present invention is not restricted to the particular embodiment thereof herein shown and described. Moreover, it is not indispensable that all the features of the invention be used conjointly, since they may be employed advantageously in various combinations and subcombinations.

What is claimed is:

l. A sectional steel boiler including a front, a back and a plurality of intermediate sections communicatively connected and enclosing a combustion chamber; said intermediate sections being hollow and having at least two spaced horizontally aligned registering openings extending therethrough forming flue passages, said openings having water backed walls; said front section being hollow and having an opening extending through its lower portion to provide access to said combustion chamber and having an elongated transverse pocket formed in its upper portion, said opening having water backed walls and being provided with a closure member, said pocket opening rearwardl and communicating with said flue passages and having its top, bottom and side walls water backed, the front wall of said pocket having openings therein to provide access to said flue passages for cleaning, said openings in said front wall being provided with closure members; said back section being hollow and having at least one flue passage having water backed walls extending therethrough and communicating with one of said flue passages through the intermediate sections and at least one elongated vertically extending pocket, said pocket being open in front and having water backed top, back and side walls and having its lower end opening into the combustion chamber and its upper end communicating with another of the flue passages through the intermediate sections; all of said sections being independent of each other and having external nipples at their top and bottom portions connected to outlet and return headers, respectively, and constituting the sole connections between said sections, whereby any of said sections may readily be removed and replaced without disturbing the other sections; the construction being such that the hot gases of combustion will be directed upwardly and forwardly through one of the flue passages in the intermediate sections into the pocket formed in the front section where they are directed inwardly and rearwardly through another of the flu passages in the intermediate section into and through a flue passage of the back section.

2. A sectional steel boiler including a front, a back and a plurality of intermediate sections communicatively connected and enclosing a combustion chamber; said intermediate sections being hollow and having four spaced horizontally aligned registering openings extending therethrough forming flue passages, said opening having water backed walls, said front section being hollow and having an opening extending through its lower portion to provide access to said combustion chamber and having an elongated transverse pocket formed in its upper portion, said opening having water backed wallsand' being provided with a closure memben'said pocket opening 'rearwardly and communicating with said flue passages and having its top, bottom and side walls Water backed, the front wall of said pocket having openings therein to provide access to said flue passages for cleaning, said openings in said front wall being provided with closure members; said back section being hollow and having a horizontally spaced pair of flue passages having water backed walls extending therethrough and communicating with the two inner flue passages through the intermediate section and a spaced pair of elongated vertically extending pockets, each of said pockets being open in front and having water backed top,back and side Walls and having its lower end opening into the combustion chamber and its upper end communicating with one of the outer flue passages through the intermediate sections; all of said sections being independent of each other and having external nipples at their top and bottom portions connected to outlet and return headers, respectively, and constituting the sole connections between said sections, whereby any of said sections may readily be removed and replaced withoutdisturbing-the other sections; the construction being such that the hot gases: of combustion will be directed upwardly and forwardly through-zthe outer flue passages in the intermediate-sections into the pocket formed in the front section where they are directed inwardlyandxrearwardly through the two inner flue passages-inthewintermediate sections into and through the two flue-passages of the back section.

NORWOOD ACHEY.

REFERENCES CITED The followingreferences are of record in the file of this, patent:

' UNITED STATES- PATENTS 

